Features: 1.Intelligent infrared recognition, will automatically switch the night vision mode when the light is insufficient, so that you can see any abnormalities outside the door at night, and monitor the safety of the whole family. 2.WiFi connection, 24 hours automatic detection of abnormalities and capture and video (requires storage device) and push abnormal messages to the mobile phone to remind at the same time. 3.Built with high?quality shell, unique design, easy installation, one?button start has never been easier. 50m/54.7yd strong penetration, no longer have to worry about not receiving the signal or no sound. 4.Support mobile phone real?time monitoring, even if you are away from home, actively wake up monitoring anytime and anywhere, master the dynamics with one hand, so that you will not miss any screens. 5.WiFi wireless connection does not require wiring, the doorbell is equipped with a battery and the signal is stable. The 166 lens has twice the field of view, and the corners of the door, yard, corridor, aisle are clear. 6.Support two way intercom, support infrared night vision, distance up to 10m/11yd, can realize intelligent linkage with other products that support for TUYA. Visiting guests can make video voice calls and a short video recording, the host can know the incoming without oprning the door. 7.Adopt powerful, high?performance programmable media Hi3518E, built?in ARM926 at Max.440MHz and high?speed video co?processor. Support automatic white balance, automatic gain control, and automatic backlight compensation. 8.With HiSilicon liteos low?power solution, IR turns on the night vision function, infrared and ICR are automatically detected; IR turns off the night vision function and disables the infrared normally off, ICR is fixed in the day vision mode. Specification: Item Type: Smart Doorbell Material: ABS Plastic Voltage: 100-240V Size: Approx. 141.5x 45.5x32.4mm/5.6x1.8x1.3in(Length x Width x Thickness) Wake-up mode: Doorbell Button Wake-up, PIR Human Body Detection Wake-up, Mobile Phone Active Wake-up Alarm Push: Push Quickly Within 1 Second Number of Online Users: Multiple Users at the Same Time Dynamic Domain Name: With Own Dynamic Domain Name Signal to Noise Ratio: 39dB Lens/Viewing Angle: Lens Angle 166 Night Vision: Automatic Switching of Dual Filters, Approx. 6pcs 850nm28Mil High-Power Infrared Lamps, Night Vision Approx. 10m/11yd Compression standard: H.264 Main Profile/H.264 Baseline Profile/MJPEG/JPEG Baseline Resolution: 1920x1080 Code Rate: CBR/VBR Output Code Rate Range:128-4096kbps Input: 1 x Built-in -48dB Microphone Output: Built-in speaker (81W) Intercom: Two Way Voice Intercom with Echo Cancellation Compression Standard/Bit Rate: ADPCM/32kbps Network Protocol: TCP/IP, HTTP, TCP, UDP, SMTP, FTP, DHCP, DNS, DDNS, NTP, UPnP, RTSP, P2P, etc. Wireless Network: 802.11b/g/n Wireless Network Security: WPS Security Encryption Wireless Connection: WIFI Configuration with One Click Video Mode: Motion Detection Video, Doorbell Button Trigger Video, Manual Video Storage: Memory Card Storage(NOT Included), Support up to 32G Power Supply Mode: Battery Powered 2pcs 18650 Batteries (Not Included) Internationally Working Temperature: -10-50 Working Humidity: